This paper proposes a 20 MHz low-profile dc-dc converter with magnetic-free characteristics based on aircore planar inductors. The switch and diode of the proposed converter operate in soft-switching modes, which significantly reduces the switching loss. Furthermore, the parasitic capacitances are taken as part of corresponding resonant capacitors. A high-performance aircore inductor with a variable width and an optimal connecting angle is analyzed. The optimal parameters design method to achieve minimum winding resistance is derived in detail. The resonant driving method is adopted to reduce driving loss in a high-frequency condition. A 20 MHz prototype is built to verify the feasibility of the proposed converter.

中文翻译：

---

具有无磁特性的 20 MHz 薄型 DC__C 转换器


本文提出了一种基于空心平面电感器的具有无磁特性的 20 MHz 薄型 DC-DC 转换器。所提出的转换器的开关和二极管以软开关模式运行，这显着降低了开关损耗。此外，寄生电容被视为相应谐振电容器的一部分。分析了一种具有可变宽度和最佳连接角度的高性能空芯电感。详细推导了实现绕组电阻最小的最优参数设计方法。采用谐振驱动方式，减少高频情况下的驱动损耗。构建了 20 MHz 原型来验证所提出转换器的可行性。